Remove keynavigation code from examples.
Remove keynavigation code from examples.

We dont need this now that it is implicit.

Change-Id: I5a4e92b1cfc8e1ffb37933ce6094036b828d8464
Reviewed-by: J-P Nurmi <b84a892f57a298bb5dae653b4e188948a84d5549@digia.com>

drgvond/qtquickcontrols,mizukusak/qtquickcontrols,drgvond/qtquickcontrols,kobolabs/qtquickcontrols,jfaust/qtquickcontrols,richardmg/qtcomponents,jfaust/qtquickcontrols,kobolabs/qtquickcontrols,kobolabs/qtquickcontrols,mizukusak/qtquickcontrols,drgvond/qtquickcontrols,mizukusak/qtquickcontrols,richardmg/qtcomponents,richardmg/qtcomponents,jfaust/qtquickcontrols